. as president obama hits the road to sell his plan to curb gun crimes. but first, the new information about the victims of a deadly tour bus crash in southern california. as government crash in southern california. as government records reveal a series i'm lom renzo.nz i woi rk for 47 differffent companies. well, te, chnically i workwo for one. that catompanypa, the united ss postalst service®, works rkfor thr ousands of home ombusinesses. becauscae at uatsps.com®, you cau n pay,pa print and haver packagesag picked up for free. i cai n even drop off free box. i wei ar a lot of hats. well, te, chnically i wear on. the thu.s. postal service®, no businusess too small. >> developing tonight. mexico's attorney general is saying, the explosion that killed more than 3- dozen people at the headquarters of the country's state-run oil company. was caused by natural gas. investigators say, gas built up in the basement of the pemex building. and was likely sparked by an electrical fault. 37- people were killed, and dozens more were hurt in the explosion. which collapsed several floors of the buildin